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A Syrian man in taken by civil defence workers following a suspected toxic gas attack in Khan Sheikhun, a rebel-held town in the northwestern Syrian Idlib province, on April 4, 2017. 
Warplanes carried out a suspected toxic gas attack that killed at least 35 people including several children, a monitoring group said. The Syrian Observatory for Human Rights said those killed in the town of Khan Sheikhun, in Idlib province, had died from the effects of the gas, adding that dozens more suffered respiratory problems and other symptoms.
 / AFP PHOTO / Mohamed al-Bakour        (Photo credit should read MOHAMED AL-BAKOUR/AFP/Getty Images)
A Syrian man in taken by civil defence workers following a suspected toxic gas attack in Khan Sheikhun, a rebel-held town in the northwestern Syrian Idlib province, on April 4, 2017. 
Warplanes carried out a suspected toxic gas attack that killed at least 35 people including several children, a monitoring group said. The Syrian Observatory for Human Rights said those killed in the town of Khan Sheikhun, in Idlib province, had died from the effects of the gas, adding that dozens more suffered respiratory problems and other symptoms.
 / AFP PHOTO / Mohamed al-Bakour        (Photo credit should read MOHAMED AL-BAKOUR/AFP/Getty Images)

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    Suspected gas attack reportedly kills dozens

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Suspected gas attack reportedly kills dozens

At least 70 people, including at least 10 children, have been killed in what is suspected to be one of the deadliest chemical attacks in Syria in years, activist groups say. CNN's Barbara Starr reports.

Suspected gas attack reportedly kills dozens

At least 70 people, including at least 10 children, have been killed in what is suspected to be one of the deadliest chemical attacks in Syria in years, activist groups say. CNN's Barbara Starr reports.